1/* $NetBSD: linux32_exec.h,v 1.7 2017/04/26 22:41:59 christos Exp $ */
2
3/*-
4 * Copyright (c) 2006 Emmanuel Dreyfus, all rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Emmanuel Dreyfus
17 * 4. The name of the author may not be used to endorse or promote
18 * products derived from this software without specific prior written
19 * permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE THE AUTHOR AND CONTRIBUTORS ``AS IS''
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33#ifndef _AMD64_LINUX32_EXEC_H
34#define _AMD64_LINUX32_EXEC_H
35
36#include <sys/exec_elf.h>
37
38#define LINUX32_M_I386 100
39#define LINUX32_MID_MACHINE LINUX_M_I386
40#define LINUX32_USRSTACK 0xC0000000
41
42#define LINUX32_DEBUGLINK_SIGNATURE 1
43
44/* Counted from common/linux32_exec_elf32.c */
45#define LINUX32_ELF_AUX_ENTRIES 15
46
47#define LINUX32_RANDOM_BYTES 16 /* 16 bytes for AT_RANDOM */
48
49#if 0
50
51/* Hardware platform identifier string */
52#define LINUX32_PLATFORM "i686"
53
54#define LINUX32_CPUCAP (cpu_feature[0])
55
56/* vsyscall assembly */
57static char linux32_kernel_vsyscall[] = {
58 0x55, /* push %ebp */ \
59 0x89, 0xcd, /* mov %ecx,%ebp */ \
60 0x0f, 0x05, /* syscall */ \
61 0xb9, 0x7b, 0x00, 0x00, 0x00, /* mov $0x7b,%ecx */ \
62 0x8e, 0xd1, /* movl %ecx,%ss */ \
63 0x89, 0xe9, /* mov %ebp,%ecx */ \
64 0x5d, /* pop %ebp */ \
65 0xc3, /* ret */ \
66};
67
68/* The extra data (ELF auxiliary table and platform name) on stack */
69struct linux32_extra_stack_data {
70 Aux32Info ai[LINUX32_ELF_AUX_ENTRIES];
71 char hw_platform[sizeof(LINUX32_PLATFORM)];
72 int pad;
73 Elf32_Ehdr elfhdr;
74 char kernel_vsyscall[sizeof(linux32_kernel_vsyscall)];
75};
76#define LINUX32_ELF_AUX_ARGSIZ sizeof(struct linux32_extra_stack_data)
77
78#else
79
80#define LINUX32_ELF_AUX_ARGSIZ \
81 (LINUX32_ELF_AUX_ENTRIES * sizeof(Aux32Info) + LINUX32_RANDOM_BYTES)
82
83#endif
84
85#ifdef _KERNEL
86int linux32_exec_setup_stack(struct lwp *, struct exec_package *);
87#endif
88
89#endif /* !_AMD64_LINUX32_EXEC_H */
90